Review Question - QID 219958

A 48-year-old middle school teacher presents to your clinic to evaluate hand pain and paresthesia. She reports that symptoms primarily occur at night, and affect the volar aspect of her radial three digits. Provocative testing with repeated tapping and manual compression in proximity to the intersection of the distal wrist crease and palmaris longus tendon recreate her symptoms. Which of the following best describes the anatomic insertion point of the muscle most likely to be affected in advanced stages of this compressive neuropathy?